Connect your Mac to a power adapter while its lid is closed and it's connected to an external display.

Additionally, MacBook Pro (2018) and MacBook Air (Retina, 13-inch, 2018) turn on when you press any key on the keyboard or press the trackpad.

1. On earlier Mac Pro models, the power button is a circular button on the front of the computer, above the headphone jack.
2. On earlier Mac notebook models, the power button is a circular button next to the keyboard.3. To start up your MacBook Pro or MacBook by plugging it in, make sure to use an AC adapter that provides sufficient power, like the one that came with the computer. Your Mac notebook's battery must have some charge to start up when you connect it to power.

Turn off (shut down) your Mac

The best way to shut down your Mac is to choose Shut Down from the Apple () menu.

Just as your Mac follows a startup process after it turns on, it follows a shutdown process before it turns off. That process includes automatically quitting all open apps and logging out of your macOS user account.

Press and hold the power button to turn off your Mac only if it isn't responding. You'll lose unsaved changes to any documents that you have open.

If your Mac won't turn on

If your Mac doesn't turn on, check your power connection, and if you're using a Mac notebook, make sure that its battery has some charge. You can also try holding down the power button for ten seconds, then pressing the power button again to see if the Mac turns on. Learn more about what to do if your Mac won't turn on.